MassMutual Mid Cap Growth I (MEFZX)

Fund Assets	1.74B
Expense Ratio	0.64%
Min. Investment	$0.00
Turnover	38.00%
Dividend (ttm)	n/a
Dividend Yield	n/a
Dividend Growth	n/a
Payout Frequency	Annual
Ex-Dividend Date	Dec 15, 2025

Previous Close	17.77
YTD Return	4.61%
1-Year Return	5.84%
5-Year Return	9.50%
52-Week Low	15.67
52-Week High	20.50
Beta (5Y)	1.09
Holdings	189
Inception Date	Nov 15, 2010

About MEFZX

MassMutual Mid Cap Growth Fund Class I is an open-end mutual fund focused on achieving long-term capital growth by investing predominantly in equity securities of mid-capitalization companies. The fund is actively managed and targets firms that its team of experienced managers believes have a higher potential for earnings and revenue growth compared to the average mid-cap stock. Its portfolio is broadly diversified, holding over 180 individual securities, with the top 10 holdings accounting for roughly 15-19% of assets. The fund invests at least 80% of its net assets in midsize companies, primarily within the U.S., and maintains a modest allocation to foreign equities. This approach positions the fund to capitalize on growth trends in sectors such as healthcare, technology, consumer cyclical, and energy. With an inception date in 2010 and a competitive expense ratio, the fund serves institutional and individual investors seeking exposure to the growth potential of mid-sized U.S. companies. The fund's strategy aligns its performance benchmark with the Russell MidCap Growth Index, emphasizing its commitment to capturing mid-cap growth opportunities in the market.

• Fund Family: MassMutual
• Category: Mid-Cap Growth
• Performance Rating: Average
• Risk Rating: Below Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MEFZX
• Share Class: Class I
• Index: Russell MidCap Growth TR

Performance

MEFZX had a total return of 5.84% in the past year, including dividends. Since the fund's inception, the average annual return has been 10.52%.

Equivalent Funds

These are funds that follow the same index from the other major fund companies.

Symbol	Provider	Name	Expense Ratio
VMGRX	Vanguard	Vanguard Mid-Cap Growth Fund Investor Shares	0.34%
FMDGX	Fidelity	Fidelity Mid Cap Growth Index Fund	0.05%

Other Share Classes

These are alternative share classes of the same fund, from the same provider.

Symbol	Share Class	Expense Ratio
MGRFX	Class R5	0.76%
MMNGX	Class Y	0.76%
MEFYX	Service Class	0.86%
MMELX	Administrative Class	0.96%

Top 10 Holdings

17.16% of assets

Name	Symbol	Weight
Datadog, Inc.	DDOG	2.07%
Agilent Technologies, Inc.	A	1.96%
Teradyne, Inc.	TER	1.83%
Mettler-Toledo International Inc.	MTD	1.76%
Snowflake Inc.	SNOW	1.64%
Fixed Income Clearing Corp. - FIXED INC CLEARING CORP.REPO	n/a	1.62%
Burlington Stores, Inc.	BURL	1.60%
Lattice Semiconductor Corporation	LSCC	1.58%
Keysight Technologies, Inc.	KEYS	1.57%
XPO, Inc.	XPO	1.52%

Dividend History

Ex-Dividend	Amount	Pay Date
Dec 15, 2025	$3.40193	Dec 16, 2025
Dec 13, 2024	$2.85273	Dec 16, 2024
Dec 13, 2023	$1.06829	Dec 14, 2023
Dec 14, 2022	$2.6319	Dec 15, 2022
Dec 16, 2021	$5.94839	Dec 17, 2021
Dec 14, 2020	$1.59387	Dec 15, 2020

Data Sources: Tiingo, Twelve Data, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Twelve Data. Several fund data points are also provided by Finnhub.

Last checked:

Oct 16, 2026

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